Glass-forming apparatus



June 21.1927.

0. A. HANFORD GLASS FoRMmG APPARATUs Filed Nfaroh 31. 1924 5 Sheets-Sheet 1 ATTORNEY.

June 21,1927. `*1,632,963 O. A. HANFORD GLASS FORMING APPARATUS Filed March 31. 1924 3 Sheets-Sheet 2 ANO/@Ew J. SGL/EPE TH Oe//v A HA Fo/@p @mkv ' A TTORNEY.

June 21, 1927.

O. A. HAN FORD GLASS FORMING APPARATUS Filed March 31. 1924 3 Shouts-Sheet 3 0r INVENTOR.

OQ//v A /L/A NFO P A TTORNEY.

Patented June 21, 1927.

UNITED s'raifiis" i PATENT ori-ica omit A. HANFoi-in, innonasnn,` LATE or ooiiuivipisus.` Iori-Ivo; BY iiitnnnw J; sCHLnRE'iH,

v ADMINISTRATOR, yOIE COLUMBUS, OHIO, ASSIGNOR '.O THE FEDERAL GLASS COlVIw` PANY, OF COLUMBUS, OHIO, A CORPORATION OF OHIO.

GLASsFRMiNG APPARATUS.

iimiiiemmi niea March '31, i924. semi Nb. 703,130.

rThis invention relates to `glass forming apparatus and has particular relation to theV provision of a novel method and apparatus ioi the introduction of air into partially i'oi'ined blanks 4ot glass Ybot-h during)y` the stages leadin Y to the tiiial blowing' ot the glass and during the linal blowing and tor inatiou ot the article to be produced. It is especially suitable iii connection with thc production ot blown ware ot the .iiner type7 such as blown tumblers and electric light bulbs.

ln the past, the introduction ot air into the glass blank has been'the cause ot a high percentage of waste as a result of the nature of the air introduced andthe manner ot cou' trolling' the air during` the introduction. Detects primarily arise troni the aassage ot i'li i air in contact with oiled surfaces andthe condensation and sediment collected by the air on its way to the blank. I"iiith'e.imore7 other detects arise inthe operation ot the air supplying means and the control and regulation ot the air supplyingr means to adjust the glass Ytorii'iinp,rv apparatus to diiferent conditions of manufacture.

The aim is the provision of an entirely novel method ot supplying' the air to the .fglass blank which eliminates all possibility ot oil or water marks being formed inthe are and which automatically controls ther introduction of the air to the blank under all conditions.

plished by the utilization of a combination oi automatically operating` and controlling` mechanisms located between the air'supply and the means for holding the blank prior to and during` its torinatioii, and which operating' and controlling` mechanism is eliectiye to intermittently introduce air to theblan'k without causing any stoppage in the iiow thereof, to pneumatically control the a'pparatus .tor coifitrollinnl the introduction ot air to the blank and to'autoniat-ically controll the application of the air to the blank to suit the diherent Conditions olf prcssiiieand kinds and sizes ot blanks.

More speciiically this invention comprises length of application required in diiteient lthe provision' oft intermittently' separable units which are continuously supplied withv air, the utilization of pneumatic means for actuating` and controlling` the movements ot the interinittently operable air units and the provision means preferably timed relatiye to the rmotion ot the other units ol theglass'torming machinelior automati lally lcoii'tiollirig the application of the pneu` matic means for subsequentlycontrolling the iiiterii'iittent application ott the air structure units.V These airrstructure units are-preterably separated whenever air is not desired to reach the blank and when separated the .air ifs-designed to flow freely to the atmosphere with the result rthat all danger ot condensatioiris avoided.l The means "for con# trolling the application and duration of ap# plication, ot the separable air structure units i `7o timed relation to the actuation ot the gen-` is designed tobe automatically opeiated'in eral Lglass forming` unit' and is adjustable to suit different conditions of operation and manufacture during the operation ot the inachine; Y u y' Various other features of this invention will be apparent as this description pro? guesses.l and will be brought out in the' claims appended y method it is preferred toiise the apparatus showniii the appended drawings wherein rr similar. characters of reference designate cor.- l responding parts and wherein: This novel method*is'preteiably accom- Figure lis'. a letail `front elevation, partly broken away, of the apparatus torcontrolling "the introduction of air' to the blank andshowing the nozzle structure and pneu` inatical operating means t'or controlling the opeiationof such nozzle; l

lFigure* 2`is a detail View taken' on line 22 of `Figure 1 n Figure Sis a diagrammatic illustration ot the air controlling apparatus in combination with a blowing head 'for receiyinp; and inanipiilating the` glass blank during` the introductionA of air thereto.

Figure 4 is a front eleyation, partly broken away, ot'the adjustable cam dialfstructure for vautomatically controlling the `pneun'iatic operation of 4the nozzle ele'ii'ients shownk in hereto. In performing Vthis `*Figure 1 and also showing the manner of operatively connecting the cain structure with the means for directly operating 'the air controls. Figure 5 is a detailview of one ofthe cam vnuts forming a part of the dial shown in Figure 4. Y

Figurev 6 is a side elevation, partly in section, of the structure shown in Figure 4 and showing themanner of conducting the compressed air controlled by the unitsshowninr` Figure 4 to the nozzle structure `shown in Fi ures1and2.` y y igure 7 is a fragmentary plan view of the air valvehousing and showing the air passages which conduct the air to the n ozzle structure.

`ln the dra-wings, `the apparatus to which `this invention relates is shownin detail as comprising a structure for controlling the introduction of air into glass blanks. Furf tliermore, the combination of this air control mechanism` with `a blowing head is shown diagrammatically in Figure 3 `and it will be obvious from the drawings that this air control Vmechanism may form a part offand structure is mounted. The blowing head lis preferably providedwith a receiving head 2 blowing head 1 isfshown. in

downward position but it will operate in timed relation to a forming unit. i 1

In glass formingunits forthe production of Vblown glassware it is customary in some types of machines to initially retain the un complete glass formed glass blank in a revolvable blowingV head of vai'ious forms. The purpose of this blowinghead is not only to hold'the glass blank in the desired position during the various manipulations but it is 'the means for conducting nthe air to the blank during itsV formation. This air control apparatus `is therefore shown inl-"combination `with fa blowing head of a single glass forming unlt which is diagrammatically shown and designated 1.

This blowing to be rotatedabout a horizontal axis,

. POD which same axis the air control nozzles and whichis preferably provided with a suitable groove for thereception and holdingof the glassblank during its manipulation.

Y The present invention relates primarily to,

the introduction of air throughrthe 'blowing head and into the glass blank during its formation both prior to and during the final formation of the blank In Figure 3 the be obvious that the blowiiigliead 2 may be rotated about a horizontal axis or may be rotated about its own longitudinal axis means of the bevel gears as shown. A y

The mechanism for controlling the introduction of the pull' and blow air to the lass is connected at one end tothe blowing head f introduced into head is preferably designed a vertically blank preferably comprises a conduit 3 w lichV The operation of expanding a blank-atta'ched to a blowinghead calls forasupply of puH air at certain times and at other times to the supply of blowing air, as for example, y in the making of a certaintype of'blown Y.

ware, it is desirable to introduce several successive puffs of low pressure air intoithe blank immediately after marvering oryformation of the initial blank and before and during subsequent elongation of the4 blank. Thehigh pressure air orblowair is usually to linal form.

the blank to blow the article The puffandblow air, is `supplied to the l conduits 3 and 3" by means make and breakV orureciprocatlng nozzles, one nozzle 5 being designed to co-operate with the con-` duit 3a while another nozzle 6 is designed to `co-operate withy the conduit 3b.

Broadly speaking, the air is designed to How freely through the nozzles 5 andrtand such nozzles arev designed to be `reciprocable relative to the conduits and 3b whereby the air is only passed to the conduits when'the nozzles are in a definite position. Therefore as the air is either passing through the'blank or to the ment with the result that there is no deposit of sediment or other foreign substance in the conduit andV there is no condensation during the passage of the air to marks in the ware.` Y y Each nozzle structure preferably takes the forni of a substantiall with the one end tapere as at 9 and 10. The

`conduits 3 and 3" are Vprovided with socketlike terminals 7 and 8 which Vare also preferably provided with conical seats for the re-` l ception of the conical ends 9 and 10 of the sockets. As best` shown in Figure 1 the nozzles 5 Aand 6 are disposedlongitudinallv produce any waterV cylindrical casing relative to theterininals 7 and 8 and such nozzles are shown suitably Vmounted in` guides 11 which form a part cfa supporting' plate 12.v V f Connected to theoutercasing of the nozzles 5 and dare lateral projecting conduits 13 and 14:,which extend into slots 15 and 16.

ieu

These conduits 13 and 14 are threaded into cylindrical conduit nieinbersl' and 18 which are designed to `have one end open as Vat 19 connecting with the conduits 1li and 15. The i cylindrical membersl and 18 are normally held at the end 4of their stroke by means of coil springs 20 and 21. i "Y Y i Air is introduced into theinterior of these ico atmosphere there is no stoppage of air move- Y conduits 17 and`18'and consequentlyjinto the nozzles and 6 by means of suitable ducts 22 and n3.. It will be understood that the duc 22 may be continuously connected with suitable means or'supplying it with a low pressure or puliE air while the rduct 23 may be connected with a separate means for continueusly supplying thewnozzle G with relatively high pressure or blow air.,V

The closed ends of the conduit` members 17 and 1S rest upon reduced portions 24 and ot piston members 2G and These pistons 2G and'27. operate within Va cylinder' block 28 which is held to the supporting plate 12 by means oirsuitable screws 29. The outer end of the cylinders in the pistons 2G and 27 are closed by means ot suitable screw plugs SOprOvided withv inwardly extending projections 31 which limit vthe outward stroke of the` pistons and 27. The cylinders are provided with suitable air ports 3221s shown in Figures ll and 2 and extensions 31 prevent the pistons 26 and 27 trom covering these air ports. i

The supporting `platey 12 isvprovided on one side with a hub which in turn is provided with outstanding annular rings 34 and These rings 34 and are designed to register with and enter into the comparatively deep annular grooves 36 and il which torm a part ot' the cylinder or plate 38. The inter-fitting o'tl the annular extensions 34and with the` grooves 3G and 37 form two annular air passages. T he air passage formed by the annular extension 84 and groove 3G is connected to the port 32 by an air duct 39 which extends through the 'cylinder block 2S and thence through the plate 12; It will thus be obvious that by admitting compressed air through the port 32 and Conduit 39, that it will be possible to force the piston 26 and the conduit member 17 inwardly with the result that the conical end of the nozzle 5 will be seated in the terminal .7 oitl the conduit 3a. Furthermore, 'it will be 'seen that when the pressure is released 'from the piston 2G, the spring 20 will turn such piston and the nozzle structure to their original position. The annular ypassage formed by lthe extension 35 and the groove 37 is connected in a similar manner to admit'compressed The plate 38 is mounted rotatably upon a reduced extension 39 of the shaft 40 which iorms an integral part of the blowing'headl 1 as shown in Figure'. The supporting plate 12 is also mounted on the reduced ex- ,l

air to the outer end of the piston member annular .air passages lbetween therV platef 12 and the plate' 38 there may be relative movel anv suitable,structure, similar to the plate 38, may be placed on the other-sideotI the plate 12 to continuously introduceputl .and blow air tothe ports and 23 while the plate'12 and the blowing head are rotating.

The plate 12 is provided with an extending arm 41 asbest shown in Figure 1. This arm 41: is designed to be connected by meansl ot' an upsta'nding ear 42 to a shait 43, torming a ypart of a frame 44, as at 45 and 4G. lt-will be understood that this trame 44 may form a part of a glass forming unit and in the 'l form shown is designed tok extend in front of the blowing head 1 and in parallel relation to theliorizontal shaft 40.

Extending longitudinally through the arm 41 arey air ducts 47V and 48 which connectthe lannular grooves 36 and 317 at one end to air valve cylinders 49 and 50 at the other end. The air valve cylinders 49 and 50 are provided in an oi'fset integral valve housing 51 whichk is connected to the arm 41 and the ducts 47 and 48 by means of chiots 52 and 53.- Compr'essed air is designed to be admitted tothe air valve cylinders trom a constant air line 54, as -best shown in Figures 4 and 7. This air line 54 is connected to the cylinders 49 Aand 50 by means ot an air duct 55 andsuitable ports 56 and 57. The quantity of air admitted to the ports 5G and -57 Vis controlled Iby means or adjustable needle valli/jes 58 'and 59 which are threaded into the air valve housing 51.

The air-'valve cylinders are provided with exhaust ports 60 and 61 positioned inlongitudinal alinement with'the ports 56 and 57 and at a certain distance therefrom. These intake ports 5G and 57 and the exhaust ports 60 and 61 are connected and controlled by hollow valve pistons G2 and 68, lwhich are provided at the inner end of the hollow portion with air ducts 64.V This hollowportion ot' the pistons 62 and G3 may be designated 64a and such air duct thus normally con nects the interior cylinders 49 and 50 with the atmosphere through the exhaust ports 60 and 61, as best shown in Figure (i. It will loe seen that when the openings et the pistons62 and 63 are in alinement with the exhaust ports 60 and G1 that the intake 'ports 56 and 57 are! covered bythe pistons 62 and 63. vThus, while the pistons are in this normal position there will obviously loe only atinospheric 'pressure on thedncts 47 and 4S and on the outer end of the pistons 2G and 27. Thus, due to the action of the coil springs 2t) and 2,1 these pistons will beiorced outwardly to normally withdraw the nozzles 5 and 6v out of contact with the terminals soY `7 and s and thus auo'wboth the pue and` v ,blow air to flow freelyto the atmosphere.

The outer end of the pistons 62 and'63 are enlarged as at (i-and 66, and slotted as at 67 whereby, they can be connectedby suitable studs 68 and 69 to levers 70 and 7l.

YTheseV levers 70 and 71 are pivoted at their lippe? endslto horizontally slidable bars 74` and 5.

w As best shown inFigure 6` the bar 75 is slidably carried upon the rod 76 which is secured tothe frame44 as at 77..` The bar 75 Y is secured to the rod 76 by means ofguide blocks 78 and 7 9. The guide block 79 carries an upstanding foot structure or cam 80 which is beveled `on one edge as at 81 and is provided with a series of vstep-like notches 82 upon the other edge, as isbest shown in Figure 4. This elementV 81 is designed to be automatically forced rearwardly at denite intervals and for predetermined periods by means ofa camdial that may be generally designated 83.

The general action of this cam dial 83 is `to press the element `8() rearwardly whereby the bar 75 and thelever. 7l are actuated to withdravvthe` piston 63 outwardly to close the exhaust port 61 andsubsequently open the air inletport 57. This action will be effective to admit compressed air Ato' the cylinder and thence through theducts 53 and 48 to the annular groove 36; Regardless of the position of the plate 12 and the nozzle structure relative Vto the plate '38 this annular groove 36 will conduct the admitted compressed air to the'duct 39 and y thence to the `bottom `of the piston element 26 whereby this piston element willbe forced inwardly carryingiwith itthe conduit member `17 and the nozzle5luntilthe conical end A9 `ol" the `nozzle is seated in the terminal, 7.

'It will be obvious that the seating of. the

" nozzle 6 and terminal 8. i.

nozzle 5 lwill be .ei'ectiveto' conduct the puff air through theterminal 7 and the conduit V3u to the glass blank as long as the nozzle is held in thisseated position. It will Vbe understood that the air may be `admitted directly through the nozzle and conduits 3 and or a suitable spring pressed valve inserted in the terminals 7 and 8 to prevent the outlet of the air when veither of the nozzles are retracted. As clearly shown in Figure 1 the terminal .8 is shown provided with a spring pressed valve Savvvhich is de` signed to be unseated by means of an adjustable tapered stem l0 carried by `the nozzle 6, the conical part of they stem 10 bei n g designed to izo-operate with the conical end l() oi the nozzle 6.` It will likewise be understood that the nozzle 5 and `terminal 7 Vare provided with a similar structure as The element 80'is designed to be held in i operable position b v means of a coil spring embracing` the rod 76 and `positioned Within i will beseenthat Vthereis "simple and positivemeans or changing the the recess portion '85 andbetweenthe guide [block 79 at one end and "thefframe44vati the other end. Thus, whenever the element A 80 is released by the cam dial 83 the piston `26 and valve 5 will be withdrawn andthe Vments of the piston 27 andthe nozzle' in' `the same manner that Vthe bar controls the movements of the nozzle 5. `This bar 74 is slidably supported upon a llange 86 which forms a part of the bar 75, as' clearly illustrated in Figure. 4. This bar 74 is provided at its rearward end with an upstanding collar or guide member 87 which slidesupon the rod 76 and which also carries a cam element or foot structure 88 which .is4v beveled on one side as at 89. This cam or foot structure 88 is operated` by the cam diall 83 in substantially the same manner as the ele- `V ment 80and is maintained in its normal outward posit-ion by means of a coil spring 9()` seated at oneend within a recess portion 91 of the member 87 and at its other end against a retaining pin 92. The operating bars 74 and 7 5 are embraced by a guiding bracket 93 secured to the frame 44. The purpose ofA the bracket is to obviate any tendency of the cam'dial 83 to rotate the collars 79 and 87 about the rod 76.

The cam dial 83 is preferably designed to` be actuated by and in timed relation with the operatingparts of the `glass forming machine as a unit. In Figure 6 is shown a shaft 93 which preferably forms a part ofthe entire'glass machine unit andwhich i shaft 93 extends through the frame 44 and is, provided adjacent itsvouter endwith a cam 94 keyed thereto. This cam 94 is generally designed Vfor actuating the blowing head during part of itsmovement and does not forma part of this invention. The cam 94, however, is provided with an outstanding collar 95 which forms the outer member of' a standard disc clutch structure 96, lhaving a plurality of friction plates 97 which are alternately keyed loosely'to the outer casingV 95f and to-a hub 98 of thecam dial 83. This Y disc clutch 96 is made operative by means of an adjusting nob 99 and its inwardly ex- `tending screw 100 .threaded` into the end of the shaft 93. It will be obvious that when y the nob 99 is screwedy inwardly sufficient pressure will be exerted to press the discs 97 together and cause the cam dial 8?;to revolve in unison `with the operating shaft 93'.` "It rovided a very position of the cam-dial 83 relative to the v shaft 93 whereby the cam dialA 88 may be adjusted to actuate the cam elements 81 or 88 at different times and for different durations independently of the rotation of the actuating shaft 98. f

Referring' particularly to Figure 4: the cam dial 83 is provided .with a plurality of radial slots `101 within which slots are mounted suitable cam nuts 102, each slot being preferably provided with one cam nut. Each cam element 102 isadjustable along its slot 101 and radially of the dial by means of a screw rod 103. Thejface of the cam dial 83, adjacent the slots 101, is preferably graduated and marked vso that the cam elements 102may be set in any desired graduation.

Under the usual conditions of operation, certain vof'these cam nuts are adjusted to contact with the cam element or foot 80 torender the puff air effectiveat predetermined intervals. Other cam nuts are adjustable along the slots'101 to contact with and operate the strike the cam element 80 at its narrowest top portion with the result that the cam element 8O will only be retracted yand the nozzle 5 will only be moved 'into operative position during the time it`takes'such cam element topass over therelatively narrow surface of' the ytop partof 'the cam lelement 80. Anotherica'm nut 102 may be positioned to strike thecam element v80 to co-operate with anyone of the steps on such element as soon as thel cam nut above described Yhad passedby the cam element 80. Or it will be obvious that al second cam nut may strike the cam element 80l before thejprec'eding cam nut hasreleas'ed the cam element with the result that the cam element or foot 80 would be retracted an additional length of timeV to admit the puif `air to the glass blank. Furthermore, it will vbe Vobvious that the same cam nut may be adjusted radially of its slotV 101 to vary the duration of the puff air at that particular period. Thus, by adjusting the cam nuts along theslots'101 to co-'ope'rate with different points on*y the stepped cam element 80 it is possible to secure any desired number or combination of puff4 air periods, so thatthe' puff air may be admitted to the blank at any time during its manipulation and for any length of time at such periods of admission.` The cam nuts 102 may be rendered inoperative by moving them radially inward 4so as to miss thetop of the cam' element 80. It will further'be obvious that by providingthe canil dial face with graduations that any predetermined set lsuch air of conditions may be obtained or maintained by merelyadjusting the cam nuts to correspond with the desired graduations whichv may be charted or otherwisemarked to indicatethe positions of the cam nuts to properlyvproduce a certain blownglass `artlcle; i

*One cam nut is ordinarily vutilized `and positioned near the periphery of the cam dial for controlling-the operationof the cam element 88 which in turn will control the positionofvthe blowing air Vnozzle 6 into operative relation with the blowing air terminal 8.( However,it willbe understood that the blowing period may be prolonged byl positioni'ng' a plurality of successive cam nuts at the eXtreme outward position-in `the Slots 1 01 so that they will `contactwith andV force the camelement 88 rearwardly forv a relan tive lng period, as they are rotated bythe dial'into contact with such cam element.

Although itl does -notform a4 part of the presentinvention, it 'will be understoodlthat in conducting Vthe.compressed air to the glass blankthat this air-is impregnated with a definite amount 'of moisture in order to'control the expansivenes's of such compressed air after rit has been introduced into the glass blank. TheA primary result of introducing moisture im regn'ated air to the blank is Ithat wi leX'pand more slowly and toa greater' extent and' will eontnue to expand for a greater length of time than ifv it were not moisture-impregnated. It will beenderstood that they'compressed air maybe 'moistened either beforefit enters the ports'f22fand 23-of the nozzlelstructure or laftcrithas entered into the nozzles-5 'and 6 where it may bek combined with moisture which-may be yconducted into the nozzles in any suitable manner.

' In operation, the cam dial 83 is clamped to the shaft 93 in a certain predetermined relation 4toI such shaft 'and the cam nuts k102 adjusted radiallyof their respective slots'so as toV contact with the cam or foot elements 80 and 88. Suitable means yis provided which will continuously introduce puff aii" into the inlet port 23. Thus, while the nozzle's 5 and 6 are retained in theirnormal positions 'by means of springs A20 and 21, puit` airand blowing Aair-will continuously flew through the conical outlets 9 andlO-gof the'nozzles intorthe atmosphere. Assuming that a lmolten glass blank is inserted` in the groove or other holding means of the blank receiving head 2 and that the blowing head 14 is rotated-aboutit's shaft 40 by means in timed relation to the shaft 93 then one of the cam nuts 102 will come in contactwith the cam element 80 and move vsuch element rearwardly so 'as to move the piston element 'outwardly. This' outward movement lof the piston 63 will close the exhaust port l61 and open the ecrnpressed air inlet port 57;

los

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i walnuts pea,

57 isxuncovered compressed ,i air will vtlow throughithe,conduits .50,.53-and j7:48'totheannular groove 36 from Where-such :z compressed air willpass through the conduit `39 to the `outer end of `the This piston 26 will thus be moved inwardly putt` air piston y26.

i 'towards the shaft 40 to operate the clement 17 and thet attachednozzle 5. The nozzle 5 l will be moved into seatingrelation with the terminal 7 whereby thepuff air continuously admitted tofthefport22 will be cut oliffrom the atmosphere andwvill `enter the fglass lblank through the conduits fand `3 regardless ot' the relative positioniof the 'supportingplate 12 andthe plate 38; The

nozzle Savill be maintainediin operation `with y the terminal 7 long as the camelement El()` is pressed rearwardly by one'gorlmoreof .thecaln nuts 102i `ment 80 is releasedby anycam nut the pis- `As soon'as thecam eleton 563 will be automatically movedinwardly to cover the inlet Aport 57 and to open the exhaust port 6l whereby p the sprinm will force the piston 26 outwardly-andt us separatte the njozzle fromthe terminal @Obviously this operation will bezrepeated l i pendent upon the period and lengthof time i that-` an `of i the dilerent A reciprocation ofthe nozzle 6 inicontactiwith i ica-1n nut 102Mcontacts` 4with and movesft e-camelementf 80g.4 The operation elements which control the the terminal 8 is substantiallythe sameas theelements as above described and it will beinoted thatany positive actuation of the cam element'88 will automatically and pneui matic'ally effect the movement. of the nozzle (tinto -operative Vrelation `with the terminal 8 at any desired period and `for any desired length of time.

1t will be. seen that there is providedan i extremely simple but positlve` acting device` for intermittently admitting either puff air or blowing air to a glass blank and at the i same time positively preventing thel `introduction ofany sediment,` oil or other-for- "eign material and preventing the introduction of any condensed Amoisturelt will be further obvious that thereis also provided l novel controlling means adjustable in timed relation to the operation ofthejgieueral glass "forming `device and adjustabl'epin itself to control-the time of introduction andthe length of introduction air to; the glass blank also effective to adjustably and pneumati` `cally `control theiintermittent operation of l nozzles and` thenozzles for the introduction of the puff `a.11dblo\ving air independentlyofi the passage of such puff and blow air through `the L assume during the manipulation of the glass blank; c ic c at diff i ferent timespand for dili'erent durationsde Ofi. the air and.

of'puli' air orblowing i and `which meanss l independently of the position i that the` nozzle supporting-structure may ..Ha\ing thus described this invention what claimed .isy' n f- Meansi. for introducing fluid to glass blankscomprising a conduit leading` to the blank retaining.

`which `fluid` is `passing continuously and pneumatic means for intermittentlyl moving .said nozzleinto `co-operativerelation tosaid' Y 2. Means for introducinglfluid to a glass blank comprising a plurality of nozzles: for introducingiiuids of different` pressures to head, a normally closed valve in said conduit, a nozzle.throughV vthe blank and penumaticmeans for controlc Huids ofditerentpressures to means for movc i means Vfor alternately into 4:3o-operative f rela-: l

check valve, for controlling theintroduction-s` i the check valve.

means for pneumaticallyren-- Ydering the nozzle strncturejetfectlve to open m6. .Glass y forming 1 apparatus comprising i movable on said cam structure forcontrolling the introduction of air to said blank. `during lthe movement ofisaid retaining means.y i

blan i `horizontal axis,V a revolvable nozzlestructure blank `retaining means rotatable z cani structure and radially adjustable meansV l l 7.r Glass-nforming" apparatus 1comprisinga j `retaining means movable about la for; `fautomaltically introducing airV to said Y blank inga i contro ling the actuation of said nozzle structure duringfsaid revolution.

and radially adjustable means form-V art of a rotatable cam structure for iio n 8. In.y glass `forming apparatus having means for 4pneurnatically controlling the l inbination of a cam having adjustable cam contact surfaces with cci-operating upon which saidV cam surfaces c by the amount-of air uiiitfrodncedjinto each successive blank may be -.predetermined. Q

' 9.1In glass forming apparatus i havingr means `for pneumatically controlling the introduction of air to the bination of a cam havingzradially adjustable cam contact surfaces Withcooperating step-elementfupon which said cam surfaces operate, the time of contact between the cam surface and the stepelement determining the period of introduction of air to the blank.`

vstep element operate Wheree' l glass blank, the comtroductionof airto the glass blank, thecomt. i

l0. In glass `forming apparatus having tween the cam surface and the step element means 'for pneumatioally Controlling the indetermining' the period of introduetion of 1U troduction of fluid to a glass blank, the eomair to the blank. i bination of a dise member and cam Contact In testimony whereof I hereby aix my 'f points adjustable radially of said dise to signature.

relatively different positions or to the Same ANDREW J. SCHLERETH, points, of a stepped element upon which said Administrator of the E state of 071m A. H aw cam surfaces operate, the timeof Contact beford, Deceased. v 

